CN110816245B - Hybrid vehicle and planet row hybrid power system thereof - Google Patents
Hybrid vehicle and planet row hybrid power system thereof Download PDFInfo
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- CN110816245B CN110816245B CN201810903287.7A CN201810903287A CN110816245B CN 110816245 B CN110816245 B CN 110816245B CN 201810903287 A CN201810903287 A CN 201810903287A CN 110816245 B CN110816245 B CN 110816245B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K6/00—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00
- B60K6/20—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs
- B60K6/22—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs
- B60K6/36—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs characterised by the transmission gearings
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- Combustion & Propulsion (AREA)
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- Mechanical Engineering (AREA)
- Hybrid Electric Vehicles (AREA)
- Structure Of Transmissions (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
Abstract
The invention relates to a hybrid power vehicle and a planet row hybrid power system thereof, wherein the planet row hybrid power system comprises an engine, a planet row, a main drive motor, an auxiliary motor and a system output shaft, the planet row is provided with a first transmission component, a second transmission component and a third transmission component, the main drive motor is connected with the first transmission component, the engine is connected with the second transmission component, the auxiliary motor is connected with the third transmission component, the third transmission component is provided with a first brake, the second transmission component is provided with a second brake, and the second brake locks the second transmission component when the hybrid power system is in a pure electric drive mode. When the power provided by the main drive motor is smaller than the required power of the whole vehicle, the second transmission part is locked by the second brake, the auxiliary motor drives the third transmission part to rotate to drive the planet wheel to rotate, the auxiliary motor provides certain compensation power, the continuity and maintenance of the dynamic property of the whole vehicle are realized, and the speed-up performance of the whole vehicle is better.
Description
Technical Field
The invention relates to a hybrid vehicle and a planet row hybrid power system thereof.
Background
The current series-parallel power system mainly adopts a planetary mechanism as a power dividing device, and the planetary row system has the advantages that: the decoupling device can achieve decoupling between the rotating speed of the engine and the rotating speed of the output shaft. The control system can control the rotating speed and the torque of the engine at any vehicle speed, so that the engine can work efficiently.
For example, in chinese patent document No. CN207345474U, a hybrid vehicle and a three-axis planetary hybrid system thereof are disclosed, which includes an engine, a planetary gear train, a first motor, a second motor, and a system output shaft, wherein the planetary gear train includes a gear ring, a sun gear, a planet carrier, and a planet gear, wherein the engine is connected to the planet carrier, the second motor is connected to the gear ring, the first motor is connected to the sun gear, the system output shaft is connected to the gear ring, a clutch is connected between the second motor and the gear ring, and a brake is disposed on the sun gear. In the actual working process, the hybrid system comprises the following working modes: the system comprises a pure electric mode, a combined driving mode, an engine direct-drive mode, an engine driving and power generation mode and a braking energy recovery mode, wherein the pure electric mode is that when a vehicle starts or runs at a low speed, the required power of the whole vehicle is small, at the moment, a first motor drives the vehicle independently and works in the pure electric mode, the engine does not work, a clutch is in a combined state, a brake is in an unlocked state, the first motor idles, and a second motor drives the whole vehicle after speed reduction and torque increase; the combined driving mode is that the engine and the second motor are driven simultaneously, the torque and the power required by the whole vehicle are large at the moment, the power required by the whole vehicle is smaller than the maximum output power of the engine when the vehicle is in the direct driving mode, so that the secondary energy conversion caused by power shunt is avoided, the system efficiency is improved, the vehicle enters the direct driving mode of the engine, the clutch is separated, and the brake is locked at the moment. The first motor is an auxiliary drive motor, and the second motor is a main drive motor. In the actual use process of the hybrid power system, when the system is driven in a pure electric mode, with the continuous improvement of the power requirement of the whole vehicle, the condition that the power required by the whole vehicle is larger than the power of a main drive motor exists, so that the speed improvement requirement of the whole vehicle cannot be met by the main drive motor alone, and the problems of insufficient power, poor dynamic performance and low speed improvement performance of the whole vehicle are caused; meanwhile, in the pure electric mode, the planet carrier can be driven to idle by the rotation of the gear ring, so that the planet carrier can consume part of energy, and the energy utilization rate of the whole vehicle is low.
Disclosure of Invention
The invention aims to provide a planet row hybrid power system, which aims to solve the problem that the speed-up performance of a finished automobile is low when the output power of a main drive motor in the prior art does not meet the power requirement of the finished automobile; the invention also aims to provide a hybrid vehicle using the planet row hybrid power system to solve the problem of slow vehicle speed increase.
In order to achieve the purpose, the technical scheme of the planet row hybrid power system is as follows:
the planet row hybrid power system comprises an engine, a planet row, a main driving motor, an auxiliary motor and a system output shaft, wherein one of a sun gear, a planet carrier and a gear ring of the planet row is a first transmission component, one of the sun gear, the planet carrier and the gear ring of the planet row is a second transmission component, the other one of the sun gear, the planet carrier and the gear ring of the planet row is a third transmission component, the main driving motor is connected with the first transmission component, the engine is connected with the second transmission component, the auxiliary motor is connected with the third transmission component, the first transmission component is connected with the system output shaft, a first brake is arranged on the third transmission component, a second brake is arranged on the second transmission component, and the second brake locks the second transmission component when the hybrid power system is in a pure electric driving mode.
Furthermore, for the reasonable layout of the whole structure and the compactness of the structure, the gear ring is a first transmission component, the planet carrier is a second transmission component, and the second brake is connected to the planet carrier.
Furthermore, in order to facilitate gear shifting and speed reduction of the main drive motor, the main drive motor is in transmission connection with the gear ring through a gearbox, and the gearbox is provided with more than two gears.
The technical scheme of the hybrid power vehicle is as follows:
hybrid vehicle, including automobile body and the planet row hybrid power system of setting on the automobile body, planet row hybrid power system, including engine, planet row, main driving motor, auxiliary machine and system output shaft, one in sun gear, planet carrier and the ring gear of planet row is first drive disk assembly, one is second drive disk assembly, and one is the third drive disk assembly, and main driving motor is connected with first drive disk assembly, and the engine is connected with second drive disk assembly, and auxiliary machine is connected with the third drive disk assembly, and first drive disk assembly connects the system output shaft, be equipped with first stopper on the third drive disk assembly, be equipped with the second stopper on the second drive disk assembly, the second stopper locks the second drive disk assembly when hybrid power system is in pure electric mode.
Furthermore, for the reasonable layout of the whole structure and the compactness of the structure, the gear ring is a first transmission component, the planet carrier is a second transmission component, and the second brake is connected to the planet carrier.
Furthermore, in order to facilitate gear shifting and speed reduction of the main drive motor, the main drive motor is in transmission connection with the gear ring through a gearbox, and the gearbox is provided with more than two gears.
The invention has the beneficial effects that: compared with the prior art, the planet row hybrid power system has the advantages that the second brake is arranged on the second transmission part connected with the engine, and the second brake locks the second transmission part when the hybrid power system is in the pure electric driving mode, so that the corresponding second transmission part can be locked and rotated, when the pure electric driving mode is adopted, the main driving motor directly drives the system output shaft to rotate through the first transmission part, at the moment, the second transmission part and the third transmission part are both in an idle running state, when the whole vehicle is increased to a certain speed, if the power provided by the main driving motor is smaller than the required power of the whole vehicle, the second transmission part is locked through the second brake, so that the third transmission part is driven to rotate by the auxiliary motor to drive the planet wheel to rotate, and the auxiliary motor provides a certain compensation power for the system output shaft, the power requirement of the whole vehicle is met, continuation and maintenance of the dynamic property of the whole vehicle can be achieved through the arrangement, the speed-up performance of the whole vehicle is good, the structure is simple, and the control is convenient. Of course, the second brake arranged on the second transmission part can also prevent the energy loss caused by idle running of the second transmission part driven by the first transmission part in the pure electric drive mode, so that the system is ensured to have higher energy utilization rate.
Drawings
FIG. 1 is a schematic structural diagram of a planetary row hybrid powertrain system in accordance with an embodiment of the present invention;
fig. 2 is a control flowchart of the planetary row hybrid system of fig. 1.
Description of reference numerals: 1-an engine; 2-a torsional damper; 3-a first brake; 4-a gear ring; 5-a gearbox; 6-main drive motor; 7-vehicle bridge; 8-system output shaft; 9-sun gear; 10-a planet carrier; 11-an auxiliary motor; 12-second brake.
Detailed Description
The following further describes embodiments of the present invention with reference to the drawings.
The embodiment of the planetary row hybrid power system of the invention, as shown in fig. 1 to 2, comprises an engine 1, a planetary row, a system output shaft 8, a main drive motor 6 and an auxiliary motor 11, wherein the planetary row comprises an outer ring gear 4, an inner planet carrier 10 and a sun gear 9 which are engaged with each other, and a planet wheel is arranged on the planet carrier 10. Generally, the planetary gear set includes three transmission components, namely a first transmission component, a second transmission component and a third transmission component, wherein one of the three transmission components represents the planet carrier 10, one represents the ring gear 4 and one represents the sun gear 9, and in this embodiment, the first transmission component is the ring gear 4, the second transmission component is the planet carrier 10 and the third transmission component is the sun gear 9, so that compactness of the overall layout and the structural arrangement relationship of the system can be ensured. In other embodiments, of course, the correspondence between the three transmission members of the planetary gear set and the sun gear, the planetary carrier, and the ring gear is not unique, and there are many correspondence relationships in principle, and different correspondence relationships only represent different mechanical transmission ratios.
An engine 1 in the planet row hybrid power system is connected with a planet carrier 10, and in the embodiment, the engine 1 is connected with the planet carrier 10 through a torsional damper 2; the auxiliary motor 11 is connected with a sun gear 9, a first brake 3 is arranged on the sun gear 9, the main drive motor 6 is connected with a gear ring 4 through a gearbox 5, the gear ring 4 is connected with a system output shaft 8, and the system output shaft 8 is in transmission connection with wheels. Further, a second brake 12 is provided on the carrier 10, and the second brake 12 locks the carrier 10 to prevent the carrier 10 from rotating.
In the aspect of vehicle control, when driving, the planet row hybrid power system has an electric only driving mode (EV mode), an engine and motor hybrid driving mode (EVT mode) and an engine direct-drive mode, the engine and motor hybrid driving mode is divided into a hybrid drive gearbox first gear mode and a hybrid drive gearbox second gear mode due to the arrangement of the gearbox 5, and v1< v2< v3 in the actual driving process; as shown in fig. 2:
(1) pure electric drive mode:
the gearbox 5 is in first gear engagement, the engine 1 is stopped, the auxiliary motor 11 does not work, the main drive motor 6 is used for driving the gear ring 4 to act so as to drive the whole vehicle to run, the vehicle starts in a pure electric drive mode at the moment, and the first brake 3 and the second brake 12 are not locked in the starting process.
And when the power required by the whole vehicle V _ Drive _ DemandPower is greater than the maximum power MG1_ MaxPower of the main Drive motor 6, the second brake 12 acts and locks the planet carrier 10, and when the planet carrier 10 is in a locked state, the planet wheel rotates through meshing and matching with the gear ring 4, at this time, the auxiliary motor 11 operates to Drive the sun gear 9 to act, the output end of the sun gear 9 drives the planet wheel to further rotate, further driving force is provided for the gear ring 4, and then the power of the system can be compensated through the auxiliary motor 11.
Certainly, in this mode, in the process of driving the whole vehicle only by the main drive motor 6, the rotation of the ring gear 4 drives the planet carrier 10 and the planet wheel to rotate, and further drives the sun wheel 9 to rotate, at this time, because the engine 1 and the auxiliary motor 11 do not work, the idling of the planet carrier 10 and the sun wheel 9 consumes a part of energy, and the energy conversion utilization rate of the system is low; and the auxiliary motor 11 can rotate under the driving of the idle running of the sun gear 9, and generates counter electromotive force when the rotating speed of the auxiliary motor 11 is too high, and because the weak magnetic loss generated by the counter electromotive force is large, the part of loss is distributed in a heat energy mode, and the efficiency of the whole system is influenced. In order to avoid the above problems, during the process of driving the whole vehicle only by the main drive motor 6, the second brake 12 may be locked to prevent the carrier 10 from idling, or the first brake 3 may be locked to prevent the sun gear 9 from idling, and the torque and the rotation speed output may be realized only by controlling the rotation of the ring gear 4 by the main drive motor 6.
(2) First gear mode of the hybrid drive gearbox under the hybrid drive mode of the engine and the motor:
when the vehicle speed reaches v1, the pure electric drive mode is switched to the first gear mode of the hybrid drive gearbox, at the moment, the engine 1 starts to participate in driving, and the main drive motor 6 assists in assistance. In this mode, the second brake 12 is unlocked and the first brake 3 is locked.
(3) A second gear mode of the hybrid drive gearbox under the hybrid drive mode of the engine and the motor:
when the vehicle speed reaches v2, the gearbox 5 changes from first gear to second gear, and after the gear is switched to second gear, the rotation speed of the main drive motor 6 is reduced due to the reduction of the transmission ratio, and the main drive motor 6 continues to assist.
(4) Direct drive mode of the engine:
when the vehicle speed reaches v3, in order to avoid energy loss caused by power circulation, the first brake 3 locks the sun gear 9, the auxiliary motor 11 stops running, the main drive motor 6 does not work, the gearbox 5 is switched into a neutral gear to work, and the vehicle enters an engine direct drive mode. The power circulation generated by the power generation of the auxiliary motor 11 is avoided, and the energy loss is reduced.
When the braking is performed, the engine 1 is stopped, and when the required braking power V _ Brk _ DemandPower is larger than the maximum power of the main driving motor 6, the second brake 12 locks the planet carrier 10, and the power is compensated through the braking of the auxiliary motor 11.
In the process of driving gear shifting, the main driving motor 6 needs to stop outputting torque firstly, when the speed of the gearbox 5 is changed into a neutral position and then is adjusted, when the output rotating speed of the gearbox 5 and the rotating speed of the gear ring 4 are smaller than De (representing a certain rotating speed difference), gear shifting is executed, when the main driving motor 6 stops outputting the torque and the output Power of the main driving motor 6 is smaller than the required Power of the whole vehicle, the second brake 12 locks the planet carrier 10 at the moment, the difference value of the required Power of the whole vehicle and the output Power of the main driving motor 6 is calculated, namely the output Power MG2Power of the auxiliary motor 11, and the whole vehicle is driven to run through the auxiliary motor 11.
The main driving motor 6 is used for driving the whole vehicle to run; the auxiliary motor 11 is used for generating power for the energy storage system when the engine 1 runs, applying forward dragging torque or reverse dragging torque to the engine 1 when the engine 1 is started or stopped, and assisting in driving the whole vehicle; the first brake 3 locks the sun gear 9 to realize direct drive of the engine 1 in the high-speed driving process of the vehicle, so that power circulation caused by power generation of the auxiliary motor 11 is avoided; the gearbox 5 has the effects that when the rotating speed of the main drive motor 6 is too high, the low gear can be switched to the high gear, the flux weakening loss caused by the too high rotating speed of the main drive motor 6 is avoided, and the gearbox 5 can also be switched into a neutral position in the starting or stopping stage of the engine 1, so that the impact on the whole vehicle caused by the fact that the starting/stopping torque of the engine 1 directly acts on the axle 7 is avoided.
The second brake 12 is mainly used for locking and unlocking the planet carrier 10, the second brake 12 can avoid the power interruption of the main drive motor 6 in the gear shifting process, at the moment, the second brake 12 locks the planet carrier 10, the auxiliary motor 11 works, and the auxiliary motor 11 is used for assisting in driving; meanwhile, in the pure electric mode, when the power required by the whole vehicle is greater than the power of the main drive motor 6, the second brake 12 locks the planet carrier 10, and at the moment, the auxiliary motor 11 works, so that the power compensation of the system is realized through the auxiliary motor 11; and during braking, when the feedback power required by the whole vehicle is greater than the power of the main drive motor 6, the second brake 12 locks the planet carrier 10, the auxiliary motor 11 works, and the power compensation of the braking process is performed on the system through the auxiliary motor 11.
Of course, in other embodiments, the transmission connection between the main drive motor and the ring gear through the clutch may be directly realized without adopting the structural form of a gearbox.
In an embodiment of the hybrid vehicle according to the present invention, the hybrid vehicle includes a vehicle body and a planetary-row hybrid system provided in the vehicle body, and the structure and control method of the planetary-row hybrid system are identical to those of the planetary-row hybrid system described above and are not expanded in detail.
Claims (2)
1. The planet row hybrid power system comprises an engine, a planet row, a main driving motor, an auxiliary motor and a system output shaft, wherein one of a sun gear, a planet carrier and a gear ring of the planet row is a first transmission component, one of the sun gear, the planet carrier and the gear ring of the planet row is a second transmission component, the other one of the sun gear, the planet carrier and the gear ring of the planet row is a third transmission component, the main driving motor is connected with the first transmission component, the engine is connected with the second transmission component, the auxiliary motor is connected with the third transmission component, the first transmission component is connected with the system output shaft, and a first brake is arranged on the third transmission component, and the planet row hybrid power system is characterized in that: a second brake is arranged on the second transmission component and locks the second transmission component when the hybrid power system is in a pure electric driving mode; the gear ring is a first transmission component, the planet carrier is a second transmission component, and the second brake is connected to the planet carrier;
the main drive motor is in transmission connection with the gear ring through a gearbox, and the gearbox is provided with more than two gears; the auxiliary motor is used for generating power for the energy storage system when the engine runs, applying forward dragging torque or reverse dragging torque to the engine when the engine is started or stopped, and assisting to drive the whole vehicle;
the gear ring is connected with the gearbox through a reduction gear train;
the auxiliary motor is connected with the planet carrier through an auxiliary motor transmission gear train;
the central axis of the planet row extends forwards and backwards and is superposed with the axis of the system output shaft, and the axes of the main drive motor and the auxiliary motor are parallel to and spaced from the central axis of the planet row; one of the main drive motor and the auxiliary motor is positioned at the left side of the planet row, and the other one is positioned at the right side of the planet row.
2. Hybrid vehicle, including automobile body and the planet row hybrid power system of setting on the automobile body, planet row hybrid power system includes engine, planet row, main driving motor, auxiliary machine and system output shaft, one in sun gear, planet carrier and the ring gear of planet row is first drive disk assembly, one is the second drive disk assembly, one is the third drive disk assembly, and main driving motor is connected with first drive disk assembly, and the engine is connected with the second drive disk assembly, and auxiliary machine is connected with the third drive disk assembly, and first drive disk assembly connects the system output shaft, be equipped with first brake on the third drive disk assembly, its characterized in that: a second brake is arranged on the second transmission component and locks the second transmission component when the hybrid power system is in a pure electric mode;
the gear ring is a first transmission component, the planet carrier is a second transmission component, and the second brake is connected to the planet carrier;
the main drive motor is in transmission connection with the gear ring through a gearbox, and the gearbox is provided with more than two gears;
the auxiliary motor is used for generating power for the energy storage system when the engine runs, applying forward dragging torque or reverse dragging torque to the engine when the engine is started or stopped, and assisting to drive the whole vehicle;
the gear ring is connected with the gearbox through a reduction gear train;
the auxiliary motor is connected with the planet carrier through an auxiliary motor transmission gear train;
the central axis of the planet row extends forwards and backwards and is superposed with the axis of the system output shaft, and the axes of the main drive motor and the auxiliary motor are parallel to and spaced from the central axis of the planet row; one of the main drive motor and the auxiliary motor is positioned at the left side of the planet row, and the other one is positioned at the right side of the planet row.
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| CN201810903287.7A CN110816245B (en) | 2018-08-09 | 2018-08-09 | Hybrid vehicle and planet row hybrid power system thereof |
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| CN201810903287.7A CN110816245B (en) | 2018-08-09 | 2018-08-09 | Hybrid vehicle and planet row hybrid power system thereof |
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| CN110816245B true CN110816245B (en) | 2021-12-21 |
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| CN101175657A (en) * | 2005-05-10 | 2008-05-07 | 丰田自动车株式会社 | Power output apparatus, drive system, and control method of power output apparatus |
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| CN203766482U (en) * | 2014-01-21 | 2014-08-13 | 郑州宇通客车股份有限公司 | Planet row series-parallel power system of hybrid power automobile |
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Address after: 450061 Yudao Road, Guancheng District, Zhengzhou City, Henan Province Patentee after: Yutong Bus Co.,Ltd. Address before: 450061 Yudao Road, Guancheng District, Zhengzhou City, Henan Province Patentee before: ZHENGZHOU YUTONG BUS Co.,Ltd. |